CNA or LPN programs in Knoxville - Where do I begin?

Hi Everyone! I'm new here and hopefully soon to be new to the medical field as well. I was wondering if anyone could give me any advice on where to start. I was thinking since I don't have any experience yet that I could maybe do a CNA program first just to get the feel of everything. I checked into the LPN program at TTC (Knoxville) and it seems hard to get into. I'm really nervous about the Compass test since I only have my GED and I haven't been to school in 5 years. I don't want to set myself up for failure so do you think it's a good idea to start off as a CNA and work my way into it? Also, can I get any kind of financial aid for the CNA classes? I've read a little bit about the nursing homes that offer free CNA training but are there any in Knoxville that do that? Any advice or information is appreciated! Thank you!